CN114142930B

CN114142930B - LED arrangement method for reducing ID amount in visible light positioning

Info

Publication number: CN114142930B
Application number: CN202111492102.6A
Authority: CN
Inventors: 徐海鑫; 文尚胜; 关伟鹏
Original assignee: Guangdong Guangxun Technology Co ltd; South China University of Technology SCUT
Current assignee: Guangdong Guangxun Technology Co ltd; South China University of Technology SCUT
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-02-28
Anticipated expiration: 2041-12-08
Also published as: CN114142930A

Abstract

The invention provides an LED arrangement method for reducing ID quantity in visible light positioning, which comprises four steps of ID information setting, ID information recording, information capturing and information exporting.

Description

LED arrangement method for reducing ID amount in visible light positioning

Technical Field

The invention relates to the technical field of visible light arrangement and combination, in particular to an LED arrangement method for reducing ID (identity) quantity in visible light positioning.

Background

Visible light communication is a technology which is currently concerned about, and is characterized in that a fluorescent lamp or a light emitting diode is modulated to flicker in light and shade at a frequency which cannot be identified by naked eyes, and then is captured at a certain frame rate through a camera, light and shade alternate stripes can be formed on a phase plane based on a rolling curtain effect, and transmitted information can be acquired through demodulation.

However, the visible light positioning technology still has many problems, one of the more serious problems is the problem of ID allocation of each LED in a large application scene, because of the limitation of the problems of lens frame rate, LED modulation frequency and the like, the LED cannot transmit too much information at one time, otherwise, all information cannot be completely displayed in one image, which requires that the LED cannot have ID with too many bits.

Disclosure of Invention

In view of the above problems, the present invention provides a method for LED arrangement to reduce the ID amount in visible light positioning, which is to solve the above drawbacks in the field of visible light positioning.

In order to realize the purpose of the invention, the invention is realized by the following technical scheme: an LED arrangement method for reducing the amount of ID in visible light positioning, comprising the steps of:

step one, ID information setting

At a transmitting end, a plurality of subareas are planned according to specific conditions, LEDs in each subarea are equally divided into M parts, each part comprises N LEDs, the N LEDs are endowed with different IDs, and then are classified and placed in the subareas, and then the ID information of the LEDs is continuously transmitted after modulation;

step two, ID information recording

Recording the position information of each LED and the IDs of surrounding LEDs in the first step, and storing the position information and the IDs in an LED-ID library for later use;

step three, information capturing

At a receiving end, capturing two or more LEDs by using a CMOS camera, and demodulating black and white stripes of an LED image by using an image processing technology to obtain ID information sent by the LEDs;

step four, information derivation

In the LED-ID library, specific position information of LEDs corresponding to two IDs is exported, and position information of a lens is obtained through a double-lamp and three-lamp visible light positioning algorithm.

The further improvement is that: in the first step, the letter N indicates the number of LEDs, where N is greater than or equal to sixteen.

The further improvement is that: in the first step, the classification mode is an odd number mode and an even number mode, and odd-even numbers or even-odd numbers of the N LED installation IDs are arranged in the subarea.

The further improvement is that: in the first step, the positions of the odd LEDs need to be kept the same for the LEDs in different subareas, and the positions of the even LEDs need to be changed, so that the IDs of the even LEDs beside the odd LEDs in each subarea are different.

The further improvement lies in that: in the second step, the surrounding LEDs are four LEDs having different parity adjacent to the recording LED position.

The further improvement lies in that: and in the third step, carrying out graying and edge detection on the image captured by the COMS to acquire the information of the radius and the area of the LED.

The further improvement lies in that: in the fourth step, the ID information of one LED obtained in the third step is used for finding the information of all LEDs with the same ID in the LED-ID library, and the unique LED information meeting the standard in the library is found through the ID information of the other LED obtained in the third step, so that the area of the lamp is determined.

The invention has the beneficial effects that: according to the LED arrangement method for reducing the ID quantity in the visible light positioning process, a large scene is divided into a plurality of smaller areas, LEDs in different areas can have the same ID, the areas to which the LEDs belong are distinguished by skillfully changing the arrangement mode of the LEDs, compared with the traditional one-to-one ID distribution mode, the number of the required IDs is greatly reduced, meanwhile, the LED arrangement method can be better suitable for the existing double-lamp and three-lamp visible light positioning technology, can also be synchronously used with other methods for reducing the ID quantity based on the coding mode, has a wider application range, also has the advantages of simplicity and feasibility, can greatly reduce the ID quantity required by the LEDs in a larger area, and has a wide market value.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating a first embodiment of the present invention.

Fig. 2 is a schematic diagram of a first arrangement of LEDs according to a second embodiment of the present invention.

Fig. 3 is a schematic diagram of a second arrangement of LEDs according to a second embodiment of the present invention.

Fig. 4 is a schematic diagram of an arrangement of 64 LEDs according to a third embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Example one

According to fig. 1, the present embodiment proposes an LED arrangement method for reducing the amount of IDs in visible light positioning, comprising the steps of:

step one, ID information setting

At an emitting end, a plurality of subareas are planned according to specific conditions, LEDs in each subarea are equally divided into M parts, each part comprises N LEDs, the N LEDs are endowed with different IDs, then the LEDs are classified and placed in the subareas, and then ID information of the LEDs is continuously sent after modulation;

step two, ID information recording

Recording the position information of each LED and the IDs of surrounding LEDs in the first step, storing the position information and the IDs of the surrounding LEDs in an LED-ID library for later use, wherein in the second step, the surrounding LEDs are four LEDs with different parity adjacent to the recorded LED positions;

step three, information capturing

Capturing two or more LEDs by using a CMOS camera at a receiving end, demodulating black and white stripes of an LED image by using an image processing technology to obtain ID information sent by the LEDs, and performing graying and edge detection on an image captured by the COMS to obtain radius and area information of the LEDs in the third step;

step four, information derivation

In the fourth step, the ID information of one LED obtained in the third step is used, all the information of the LEDs with the same ID is found in the LED-ID library, and the unique LED information meeting the standard in the library is found through the ID information of the other LED obtained in the third step, so that the area of the lamp is determined.

Example two

As shown in fig. 2-3, the present embodiment includes the following steps:

the method comprises the following steps: at the transmitting end, the LEDs in different partitions are represented by the same ID according to specific conditions, the ID information of the LEDs is continuously sent after modulation, wherein the transmitting end comprises a computer, a controller, an LED driving circuit, RGB-LEDs and a power supply module, for example, 32 LEDs are required by a scene, the LEDs in the scene are equally divided into 2 parts, namely a first area and a second area, each part comprises 16 LEDs, the 16 LEDs are endowed with different IDs, wherein, an even number is a type and is divided into 2,4,6, …,16, an odd number is a type and is respectively 1,3,5, …,15, the LEDs are placed in the first area according to the odd-even number or the odd-even number of the IDs or the arrangement of the IDs, as shown in figure 2, while in the second area, the LEDs are endowed with the same ID as the first area, the positions of the odd LEDs are kept the same as the first area, the positions of the LEDs are changed, after the even LEDs are changed, as shown in figure 2, the value of the adjacent LEDs are not the same as the first area, as shown in figure 8, and only the outer circle of the LEDs are changed, thus the other type, only two LEDs are arranged in the mode, namely, 16, the LEDs are arranged in the figure 3;

step two: recording the position information of each LED in the two areas and the IDs of 4 LEDs with different parities adjacent to the LEDs in the periphery, and storing the IDs in an LED-ID library;

step three: at a receiving end, capturing two or more LEDs by using a CMOS camera, extracting ID information of each LED by using an image processing technology, namely performing graying and edge detection on an image captured by COMS, acquiring information such as the radius and the area of the LED, demodulating black and white stripes of an LED image, and acquiring the ID information sent by the LED;

step four: and in the LED-ID library, specific position information of the LEDs corresponding to the two IDs is derived, the position information of the lens is obtained through a double-lamp and three-lamp visible light positioning algorithm, all the information of the LEDs with the same ID is found in the LED-ID library by taking the ID information sent by one LED obtained in the third step as a reference, and the unique LED information meeting the standard in the library is found by obtaining the ID information sent by the other LED in the third step, so that whether the LED belongs to the first area or the second area is judged.

EXAMPLE III

According to the illustration in fig. 4, the present embodiment uses an arrangement manner of 512 LEDs required by a scene, wherein odd-numbered LEDs 1,3, …,63, even-numbered

LEDs

2,4, …,64 are arranged in the manner of fig. 2, then even-numbered lamps are rotated clockwise three times along the direction indicated by the arrow to obtain another three arrangement manners, then the four regions in fig. 4 are transformed according to the method of fig. 2 to obtain a fifth arrangement manner, and on the basis of the fifth arrangement manner, even-numbered lamps are rotated clockwise three times along the direction indicated by the arrow to obtain eight arrangement manners in total, and 512 LEDs required by the scene are obtained.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An LED arrangement method for reducing the amount of ID in visible light positioning, characterized by: the method comprises the following steps:

step one, ID information setting

step two, ID information recording

step three, information capture

step four, information derivation

In an LED-ID library, specific position information of LEDs corresponding to two IDs is exported, and position information of a lens is obtained through a double-lamp and three-lamp visible light positioning algorithm;

in the first step, the classification mode is to classify through an odd number mode and an even number mode, and the odd-even numbers or even-even numbers of the N LED installation IDs are arranged in a subarea at intervals;

in the first step, the positions of the odd LEDs need to be kept the same for the LEDs in different subareas, and the positions of the even LEDs need to be changed, so that the IDs of the even LEDs beside the odd LEDs in each subarea are different;

in the second step, the surrounding LEDs are four LEDs having different parity adjacent to the recording LED position.

2. The LED arrangement method for reducing the amount of ID in visible light positioning as set forth in claim 1, wherein: in the first step, the letter N indicates the number of LEDs, where N is greater than or equal to sixteen.

3. The LED arrangement method for reducing the amount of ID in visible light positioning as set forth in claim 1, wherein: and in the third step, carrying out graying and edge detection on the image captured by the COMS to acquire the information of the radius and the area of the LED.

4. The LED arrangement method for reducing the amount of ID in visible light positioning as set forth in claim 1, wherein: in the fourth step, the ID information of one LED obtained in the third step is used for finding the information of all LEDs with the same ID in the LED-ID library, and the unique LED information meeting the standard in the library is found through the ID information of another LED obtained in the third step, so that the area to which the LED belongs is determined.